Swiveling chair



Nov. 13, 1928. 1,691,035

A. J; ADAMS v SWIVELING CHAIR Filed July 27, 1925 I, l 5 i I: I g 1111::

1311f en t Arlzw 14022028 Patent ed Nov. 1 928.

f \"FU'NIT'ED STATES 1 691,035 PATENT OFFICE.

m'rnun .1. Annals, or BAYcI'rY; MICHIGAN! nssrcnon T WILLIAM s. reams, or ELKHABT, INDIANA, TRADING As nomonn CHAIR COMPANY...

swrvnnme 01mm.

Application filed July 27,

This invention relates to improvements in swiveling chairs and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

One of the objects of the invention is to provide a novel connection between 'the seat post and standard permitting a rotative movement of the post with respect to the standardand at the sametime a relative vertical movement between the two. v

A further object is to provide a construction including a tube surrounding and hav-' ing a rotating bearing on the post and to provide a means on the standard for securing said tube thereto, which means readily permits of a vertical adjustment between the tube and standard.

These objects of the invention as well as others, together with the advantages thereof will more fully appear as I proceed with my specification.

- ,In the drawings Fig. 1 is a view in front elevation of a. chair embodying my improved construction.

Fig. 2 is a horizontal sectional view on an enlarged scale as taken on the line 2-2 ,of' Fig. 1.

Fig. 3 is a vertical sectionalv view as taken on the line 3-3 of Fig. 2.

Fig. 4 is a perspective view of a binding or clamping ring embodied in my improved construction. 1.

* Referring now in detail to that embodiment of the invention illustrated in the ac- 35" companying drawing: 1 indicates the seat frame and seat of a swiveling chair, and 2 indicates the post uponthe top end of which the seat frame is secured in any suitable -manner. As the construction of the seat frame itself and the manner of attaching it to the post 2 forms no particular part of the present invention; it need not be described in further detail at this time.

The post 2 which is of substantial length is in the form of a metallic tube having a smooth exterior surface and journaled on said post'is asecond tube 3. Said tube is capable of a'j-free rotatingmovement on the I post ia' rid'-, it .is held against endwise movein ment thereon in" any suitable manner. As

shown herein,a bolt4" isthi'eaded thro h the bottom. end of the post and is engaged y the bottom end of the tube which is,held against endwise displacement thereby. j 5 indicates as a whole the standard or REISSUED a... hr the chair and with which the tube a and post 2 is vertically adjustable in a manner which will appear later. Said standard is made up of a plurality of tubular metallic legs each of which has avertical top portion or end 6 and a vertical, bottom portion or end 7 which is offset with respect" to the top portion and is connected thereto by-intermediate horizontal and reverse curved portions'8. A caster 9 is bottom end of each leg.

The vertical top ends of said legs are grouped together about vertically spaced top and bottom spiders or plateslO and 11 respectively, each of which includes arcuately spacedears 12 with which said leg parts are engaged and are secured as by the bolts 13. Said spiders have centrally arranged aligned openings for the easy passage therethrough of the tube 3 which also has a smooth ezgterior. When the legs are secured to the spiders as before mentioned, the bottom ends of. said legs are disposed radially with respect to the post'2 and tube 3' so that the standard presents a stablefsupport or base for the chair as a whole. The horizontal portions of all of said legs are connected together by a suitable bracing spider 14. j Surrounding the tube 3 just above the bottom spider 11 is a binding ring or anmilus 15'(see Fig. 4;) ,which has a central bore slightly larger than the'outside diameter of said tube. The spider 11 has a shortupstanding'stud 16 on its top side .in a position arranged between two adjacent ears 1 '212. As shown said stud is formed by the head of a bolt secured in saidspider by an associated nut. The underside of a' portion of said ring engages on said stud and'is capableof a limited rocking movement about the same as a, .ulcrum. Spaced at equaliarcuate distances from. said stud are bolts 17117 each passing up through suitprovided on the able holes in the bottom spiderand threadis rzdiame'trically opposite what may be termed the fulcrum side thereof) downwardly toward the late and out of a plane at a right angle to t e tube and so-that 11 moved vertically 45 vide the desired height ofseat. When this has been done the lever is swung back to its i said ring binds on said post and is thus lockedthereto. v

Means are provided to act in opposition to said sp'rings when manipulated to move the 5 ring into a position standing at a right angle to' said post and tube and thus release the clampin action of said ring so that the post and tu e may be capable of a vertical adjustment upwardly or downwardly and such means is as follows:

On the bottom side of said bottom spider at a point substantially o posite the stud 16 is-provided a lug 20. pon the inner side of said lug is provided a cam member 21 and on the outer side of said lug is pivoted a lever 22, the common pivotal axis of said cam member'and lever being provided by a screw 23. The shorter end of said lever is offset outwardly to pass the adjacent leg ZO members of the standard and at the same time to provide the handle for actuating the cam. In said bottom spider is formed a slot, 24, in the plane of the cam member so that when said lever is actuated the cam will 25 pass through said slot and engage the ring to move the same against the action of the springs asbefore. described. By the use of .the bolts 17 1 7the tension of the springs 18may be adjusted toz'the best binding action of the ring upon the tube 3.

Assume that the ring is in a position exerting a binding action on the tube and it is desired to adjust the height of the seat frame to, the comfort of the occupant. Un-

der such conditions tlie lever .22 stands sub-u stantially vertic lbtween two adjacent legs of the standar Upon actuation, the cammember 21 will pass through the slot 24 in I the spider and will engage the ring and move 40 it against the action of the springs 18 into a posltion wherein it stands ata right angle to the tube. of the ring on the tube so that itis free to be in either direction to pronormal substantially vertical position and the cam member is withdrawn from its engagement w1th the ring which under the ac- 60 tion of its associated springs is immediately drawn into binding engagement on the tube and connects the tube to the standard. Thus the post is free to turn in the tube, no. matter what the vertical adjustment between the tube and standard happens to be.

' It is apparent that my improved construction, has many advantages. The binding action of the ring on the tube. may be adjusted to the best operating conditions by thread- This releases the binding action,

' ing the bolts 17 eitherfurther into or out of the ring. The parts are simple and few in number and therefore may be readily assembled and adjusted;

While in describing my invention I, have referred to certain details of construction and arrangement of parts, this is to be taken as by way of illustration only-and not by way of limitation. Hence I do not wish to be limited thereto except as-may be pointed out in the appended claims.

I claim as my invention: 1. A chair embodying therein, a standard comprising a plurahtyof legs, top and bottom spiders towhich said legs are secured, a seat post, a tube rotatively mounted on a binding ring on said bottom spider, means carried by sa1d spider for normally urging it into binding action upon said tube, and means also carried by said spider and adapted to be actuated to engage said ring to release its binding action on the tube.

2. A chair embodying therein a standard comprising a plurality of legs, top and bottom spiders to which said legs are secured,

a seat post, a tube rotatively mounted on said post and passing through said spiders,

said post and passing through said spiders,

a ring surrounding said tube near said bottom spider, coacting means on said spider and ring providing a fulcrum for said ring, coacting means operatively connecting said ring and spider at a point spaced from the,

said post and passing through said spiders,

a ring surrounding said tube near said bottom spider, coacting means on said spider and ring providing .a fulcrum for said ring, bolts passing throughsaid bottom spider and threaded into said riiig, springs on said bolts normally acting to rock the ring about said fulcrum in one direction into binding action on said tube, and means capable of being actuated in opposition to said springs for rocking said ring about the fulcrum in the opposite directlon to release the binding action thereof from the tube.

In testimony whereof, I have hereunto set my hand, this 6th day of J ul y 1925;

- ARTHUR i. ADAMS. 

